The Soni Finland twitter account has apparently started following Metallica in the last few hours. A quick look at their following list shows they've started following Machine Head, Gojira, Amorphis and Ghost accounts since following Metallica. None of these bands have played Sonisphere Finland before.

The idea for Sonisphere was first conceived by John Jackson in the late 90`S. John chose the name Sonisphere, from a combination of Sonic and Sphere. In 2008 Stuart Galbraith had formed business partnership with AEG Live called Kilimanjaro Live.